From: Andrew Morton <akpm@linux-foundation.org>
Cc: sam@ravnborg.org, hpa@zytor.com, linux@arm.linux.org.uk,
alain@knaff.lu, linux-kernel@vger.kernel.org,
linux-embedded@vger.kernel.org,
albin.tonnerre@free-electrons.com
Subject: Re: [PATCH 3/6] Add support for LZO-compressed kernels
Date: Tue, 4 Aug 2009 16:00:43 -0700 [thread overview]
Message-ID: <20090804160043.82b256d8.akpm@linux-foundation.org> (raw)
In-Reply-To: <1249311501-23102-3-git-send-email-albin.tonnerre@free-electrons.com>
On Mon, 3 Aug 2009 16:58:18 +0200
Albin Tonnerre <albin.tonnerre@free-electrons.com> wrote:
> This is the first part of the lzo patch
> The lzo compressor is worse than gzip at compression, but faster at
> extraction. Here are some figures for an ARM board I'm working on:
>
> Uncompressed size: 3.24Mo
> gzip 1.61Mo 0.72s
> lzo 1.75Mo 0.48s
>
> So for a compression ratio that is still relatively close to gzip, it's
> much faster to extract, at least in that case.
Is 3.2Mb a typical kernel size for small systems? It sounds large.
0.24 seconds booting speedup sounds pretty thin. Adding a new
decompression format will introduce more configuration/build/deployment
complexities. How do we justify this?
Did anyone look into just speeding up the gzip decompressor?
> +#ifdef STATIC
What is this STATIC thing for?
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Morton <akpm@linux-foundation.org>
To: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: sam@ravnborg.org, hpa@zytor.com, linux@arm.linux.org.uk,
alain@knaff.lu, linux-kernel@vger.kernel.org,
linux-embedded@vger.kernel.org,
albin.tonnerre@free-electrons.com
Subject: Re: [PATCH 3/6] Add support for LZO-compressed kernels
Date: Tue, 4 Aug 2009 16:00:43 -0700 [thread overview]
Message-ID: <20090804160043.82b256d8.akpm@linux-foundation.org> (raw)
In-Reply-To: <1249311501-23102-3-git-send-email-albin.tonnerre@free-electrons.com>
On Mon, 3 Aug 2009 16:58:18 +0200
Albin Tonnerre <albin.tonnerre@free-electrons.com> wrote:
> This is the first part of the lzo patch
> The lzo compressor is worse than gzip at compression, but faster at
> extraction. Here are some figures for an ARM board I'm working on:
>
> Uncompressed size: 3.24Mo
> gzip 1.61Mo 0.72s
> lzo 1.75Mo 0.48s
>
> So for a compression ratio that is still relatively close to gzip, it's
> much faster to extract, at least in that case.
Is 3.2Mb a typical kernel size for small systems? It sounds large.
0.24 seconds booting speedup sounds pretty thin. Adding a new
decompression format will introduce more configuration/build/deployment
complexities. How do we justify this?
Did anyone look into just speeding up the gzip decompressor?
> +#ifdef STATIC
What is this STATIC thing for?
next prev parent reply other threads:[~2009-08-04 23:00 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-22 14:01 [PATCH 1/5] lib/decompress_*: only include <linux/slab.h> if STATIC is not defined Albin Tonnerre
2009-07-22 14:01 ` [PATCH 2/5] include/linux/unaligned/{l,b}e_byteshift.h: Fix usage for compressed kernels Albin Tonnerre
2009-07-22 14:01 ` [PATCH 3/5] Add support for LZO-compressed kernels Albin Tonnerre
2009-07-22 14:01 ` [PATCH 4/5] Add support for LZO-compressed kernels for ARM Albin Tonnerre
2009-07-22 14:01 ` [PATCH 5/5] Add support for LZO-compressed kernels on x86 Albin Tonnerre
2009-07-29 15:37 ` [PATCH] Add LZO compression support for initramfs and old-style initrd Albin Tonnerre
2009-07-29 20:00 ` [PATCH 5/5] Add support for LZO-compressed kernels on x86 H. Peter Anvin
2009-07-29 21:02 ` Sam Ravnborg
2009-07-31 7:51 ` Albin Tonnerre
2009-07-31 9:31 ` Sam Ravnborg
2009-08-03 14:58 ` [PATCH 1/6] lib/decompress_*: only include <linux/slab.h> if STATIC is not defined Albin Tonnerre
2009-08-03 14:58 ` [PATCH 2/6] include/linux/unaligned/{l,b}e_byteshift.h: Fix usage for compressed kernels Albin Tonnerre
2009-08-03 14:58 ` [PATCH 3/6] Add support for LZO-compressed kernels Albin Tonnerre
2009-08-03 14:58 ` [PATCH 4/6] Add support for LZO-compressed kernels for ARM Albin Tonnerre
2009-08-03 14:58 ` [PATCH 5/6] Add support for LZO-compressed kernels on x86 Albin Tonnerre
2009-08-03 14:58 ` [PATCH 6/6] Add LZO compression support for initramfs and old-style initrd Albin Tonnerre
2009-08-03 15:12 ` H. Peter Anvin
2009-08-03 16:05 ` Albin Tonnerre
2009-08-03 15:11 ` [PATCH 5/6] Add support for LZO-compressed kernels on x86 H. Peter Anvin
2009-08-06 22:40 ` [PATCH 4/6] Add support for LZO-compressed kernels for ARM Russell King - ARM Linux
2009-08-07 9:24 ` Albin Tonnerre
2009-08-07 9:34 ` Russell King - ARM Linux
2009-08-07 9:36 ` Alain Knaff
2009-08-07 10:21 ` Albin Tonnerre
2009-08-07 11:29 ` Alain Knaff
2009-08-07 11:50 ` Matthieu CASTET
2009-08-07 13:01 ` Albin Tonnerre
2009-08-07 13:27 ` Matthieu CASTET
2009-08-07 13:55 ` Albin Tonnerre
2009-08-07 20:00 ` Russell King - ARM Linux
2009-08-07 20:21 ` H. Peter Anvin
2009-08-07 21:08 ` Sam Ravnborg
2009-08-11 9:44 ` Albin Tonnerre
2009-08-11 13:39 ` Sam Ravnborg
2009-08-11 14:17 ` Albin Tonnerre
2009-08-11 13:51 ` Matthieu CASTET
2009-08-11 16:03 ` H. Peter Anvin
2009-08-11 16:27 ` Albin Tonnerre
2009-08-11 16:31 ` H. Peter Anvin
2009-08-13 9:30 ` Albin Tonnerre
2009-08-13 14:07 ` H. Peter Anvin
2009-08-13 12:25 ` Albin Tonnerre
2009-08-14 10:08 ` [PATCH 4/6 v2] " Albin Tonnerre
2009-09-04 15:31 ` Albin Tonnerre
2009-08-04 23:00 ` Andrew Morton [this message]
2009-08-04 23:00 ` [PATCH 3/6] Add support for LZO-compressed kernels Andrew Morton
2009-08-05 1:36 ` H. Peter Anvin
2009-08-05 9:19 ` Albin Tonnerre
2009-08-04 23:04 ` Andrew Morton
2009-08-04 23:04 ` Andrew Morton
2009-08-04 22:55 ` [PATCH 2/6] include/linux/unaligned/{l,b}e_byteshift.h: Fix usage for compressed kernels Andrew Morton
2009-08-04 22:55 ` Andrew Morton
2009-08-05 9:29 ` Albin Tonnerre
2009-08-05 21:19 ` Russell King - ARM Linux
2009-08-04 22:55 ` [PATCH 1/6] lib/decompress_*: only include <linux/slab.h> if STATIC is not defined Andrew Morton
2009-08-04 22:55 ` Andrew Morton
2009-08-05 0:47 ` Phillip Lougher
2009-08-05 0:57 ` H. Peter Anvin
2009-08-05 1:32 ` Phillip Lougher
2009-08-05 1:08 ` Andrew Morton
2009-08-05 2:06 ` Phillip Lougher
2009-07-23 17:11 ` [PATCH 4/5] Add support for LZO-compressed kernels for ARM Albin Tonnerre
[not found] ` <0022152d7fe9b6dbcf046f4d04a6@google.com>
2009-07-22 16:08 ` [PATCH 3/5] Add support for LZO-compressed kernels H. Peter Anvin
2009-07-22 16:50 ` Albin Tonnerre
2009-07-29 13:51 ` [PATCH 3/5 v2] " Albin Tonnerre
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